I boarded at a barn like this. People there said they’d “never had a horse have problems!” but they certainly had some ulcery animals, as well as a decent injury rate (and not your average ones, think career ending). Some could be attributed to a poor farrier, but the horses worked HARD at horse shows vs at home, and with no base turnout fitness I wonder if there was a connection. Lots of things happening there that were presented as horses being horses, but I’ve seen a whole lot less of it in places with more outside time.
Lots of work for the barn staff, and my horse did not thrive there. When we were super far south he did pretty well on night turnout in the summer (14-16 hours) and day in the winter (6-8 hours). But I still have a much happier and healthier horse on maximum properly managed turnout.